今天做的项目中需要根据系统的分辨率控制窗体的位置，所以用到这些，拿出来分享一下。

这里需要引用到wxWidgets的一个库文件：#include <wx/settings.h>

我们用到的是它里面的wxSystemSettings这个类，在这里摘录一下官方帮助文档：

Members

wxSystemSettings::wxSystemSettings
wxSystemSettings::GetColour
wxSystemSettings::GetFont
wxSystemSettings::GetMetric
wxSystemSettings::GetScreenType

 

wxSystemSettings::GetMetric

static int GetMetric(wxSystemMetric index, wxWindow* win = NULL)

Returns the value of a system metric, or -1 if the metric is not supported on the current system. The value of win determines if the metric returned is a global value or a wxWindow based value, in which case it might determine the widget, the display the window is on, or something similar. The window given should be as close to the metric as possible (e.g a wxTopLevelWindow in case of the wxSYS_CAPTION_Y metric).

index can be one of:

wxSYS_MOUSE_BUTTONS	Number of buttons on mouse, or zero if no mouse was installed.
wxSYS_BORDER_X	Width of single border.
wxSYS_BORDER_Y	Height of single border.
wxSYS_CURSOR_X	Width of cursor.
wxSYS_CURSOR_Y	Height of cursor.
wxSYS_DCLICK_X	Width in pixels of rectangle within which two successive mouse clicks must fall to generate a double-click.
wxSYS_DCLICK_Y	Height in pixels of rectangle within which two successive mouse clicks must fall to generate a double-click.
wxSYS_DRAG_X	Width in pixels of a rectangle centered on a drag point to allow for limited movement of the mouse pointer before a drag operation begins.
wxSYS_DRAG_Y	Height in pixels of a rectangle centered on a drag point to allow for limited movement of the mouse pointer before a drag operation begins.
wxSYS_EDGE_X	Width of a 3D border, in pixels.
wxSYS_EDGE_Y	Height of a 3D border, in pixels.
wxSYS_HSCROLL_ARROW_X	Width of arrow bitmap on horizontal scrollbar.
wxSYS_HSCROLL_ARROW_Y	Height of arrow bitmap on horizontal scrollbar.
wxSYS_HTHUMB_X	Width of horizontal scrollbar thumb.
wxSYS_ICON_X	The default width of an icon.
wxSYS_ICON_Y	The default height of an icon.
wxSYS_ICONSPACING_X	Width of a grid cell for items in large icon view, in pixels. Each item fits into a rectangle of this size when arranged.
wxSYS_ICONSPACING_Y	Height of a grid cell for items in large icon view, in pixels. Each item fits into a rectangle of this size when arranged.
wxSYS_WINDOWMIN_X	Minimum width of a window.
wxSYS_WINDOWMIN_Y	Minimum height of a window.
wxSYS_SCREEN_X	Width of the screen in pixels.
wxSYS_SCREEN_Y	Height of the screen in pixels.
wxSYS_FRAMESIZE_X	Width of the window frame for a wxTHICK_FRAME window.
wxSYS_FRAMESIZE_Y	Height of the window frame for a wxTHICK_FRAME window.
wxSYS_SMALLICON_X	Recommended width of a small icon (in window captions, and small icon view).
wxSYS_SMALLICON_Y	Recommended height of a small icon (in window captions, and small icon view).
wxSYS_HSCROLL_Y	Height of horizontal scrollbar in pixels.
wxSYS_VSCROLL_X	Width of vertical scrollbar in pixels.
wxSYS_VSCROLL_ARROW_X	Width of arrow bitmap on a vertical scrollbar.
wxSYS_VSCROLL_ARROW_Y	Height of arrow bitmap on a vertical scrollbar.
wxSYS_VTHUMB_Y	Height of vertical scrollbar thumb.
wxSYS_CAPTION_Y	Height of normal caption area.
wxSYS_MENU_Y	Height of single-line menu bar.
wxSYS_NETWORK_PRESENT	1 if there is a network present, 0 otherwise.
wxSYS_PENWINDOWS_PRESENT	1 if PenWindows is installed, 0 otherwise.
wxSYS_SHOW_SOUNDS	Non-zero if the user requires an application to present information visually in situations where it would otherwise present the information only in audible form; zero otherwise.
wxSYS_SWAP_BUTTONS	Non-zero if the meanings of the left and right mouse buttons are swapped; zero otherwise.

win is a pointer to the window for which the metric is requested. Specifying the win parameter is encouraged, because some metrics on some ports are not supported without one, or they might be capable of reporting better values if given one. If a window does not make sense for a metric, one should still be given, as for example it might determine which displays cursor width is requested with wxSYS_CURSOR_X.

根据文档里的以上介绍，我们如果要获取屏幕分辨率，只要用下面的方法就可以了：
int   nWidth   =   wxSystemSettings::GetMetric(wxSYS_SCREEN_X, NULL);   
int   nHeight=   wxSystemSettings::GetMetric(wxSYS_SCREEN_Y, NULL);